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bmarcum · 08-11-2024

Could I get a little help from my internet ZR-1 friends. Is there a way to test the ac clutch without pulling the intake?

Long story short, I purchased this 14K mile Z (Vin 1965) to replace Vin 103 only to realize that it?s has lived its life as a ?model? not a sportscar. Nice clean car but needs lot of attention to be what it needs to be.

So, I am working bit by bit to make this the car what it needs to be. First issue that is being a pain in the humpernickle is the air conditioning. I have no air. The compressor is not coming in. Not cycling. Just not coming in.

No codes. I have power at high pressure and low pressure cycling switches, so I that is why I am thinking wiring or clutch.

First question just to confirm because I am going from memory (can?t find me FSM). Is Power sent through 25 amp fuse to ac control then through relays then to cycling switches, so if I have power at both cycling switches then there a problem between there and the AC clutch? Is this correct? Anyone have their FSM or a wiring chart?

Is there any way to test the ac clutch without pulling the intake? I have pulled the intake many times (not this car) so if it needs to be done, no issues, but I would prefer not to pull the intake unless the clutch needs changed.

08-11-2024	#1
bmarcum Join Date: Oct 2018 Location: Indiana Posts: 64	Testing AC clutch with intake on??? Could I get a little help from my internet ZR-1 friends. Is there a way to test the ac clutch without pulling the intake? Long story short, I purchased this 14K mile Z (Vin 1965) to replace Vin 103 only to realize that it?s has lived its life as a ?model? not a sportscar. Nice clean car but needs lot of attention to be what it needs to be. So, I am working bit by bit to make this the car what it needs to be. First issue that is being a pain in the humpernickle is the air conditioning. I have no air. The compressor is not coming in. Not cycling. Just not coming in. No codes. I have power at high pressure and low pressure cycling switches, so I that is why I am thinking wiring or clutch. First question just to confirm because I am going from memory (can?t find me FSM). Is Power sent through 25 amp fuse to ac control then through relays then to cycling switches, so if I have power at both cycling switches then there a problem between there and the AC clutch? Is this correct? Anyone have their FSM or a wiring chart? Is there any way to test the ac clutch without pulling the intake? I have pulled the intake many times (not this car) so if it needs to be done, no issues, but I would prefer not to pull the intake unless the clutch needs changed.